Print postscript file duplexed to printer with bash and awk only

00-note.md

Print a Postscript File Duplexed with only Bash and Awk

The awk script is using heuristic to determine where to insert the Duplex commands in the file.

The bash script is using the bash "feature" of sending to a network socket using the fake device paths that are builtin to bash.

duplex.awk

#!/usr/bin/awk -f

{ print }

/%EndFeature/ {
    print "%%BeginFeature: *Tumble False"
    print "  (<<) cvx exec /Tumble (false) cvx exec (>>) cvx exec setpagedevice"
    print "%%EndFeature"
    print "%%BeginFeature: *Duplex True"
    print "  (<<) cvx exec /Duplex (true) cvx exec (>>) cvx exec setpagedevice"
    print "%%EndFeature"
}

print.bash

#!/bin/bash
# duplex command is the awk script in your PATH
PRINTERADDRESS=169.254.1.1
duplex < "$1" > /dev/tcp/${PRINTERADDRESS}/9100